Question

X+y= 9
x / 2y = 1 (dividido)

ajuda please

Answer 1

x + y = 9

x/2y = 1 → x = 2y . 1 → x = 2y

x + y = 9 → 2y + y = 9 → 3y = 9 → y = 9/3 → y = 3

x = 2y → x = 2 . 3 → x = 6

S = {(6, 3)}